I use it when in-app search fails. Sometimes gmail search is atrociously slow or doesn't find what I'm looking for, for some reason. I also have multiple gmail

I use it when in-app search fails. Sometimes gmail search is atrociously slow or doesn't find what I'm looking for, for some reason. I also have multiple gmail accounts (don't ask why), so Greplin is way easier than searching through them individually. The Chrome extension helps a lot -- I used Greplin less before it was released.